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Patent US3678975 - Electric pencil sharpener - Google Patents

Electric Pencil Sharpener

Electric Pencil Sharpener

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The History of Pencil Sharpeners | Swingline Blog - Shredders, Staplers

Electronic Pencil Sharpener - Patent application

Electronic Pencil Sharpener - Patent application

Patent EP2078617B1 - Safety device for an electric pencil sharpener

Patent EP2078617B1 - Safety device for an electric pencil sharpener

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Patent US20060086416 - Pencil sharpener - Google Patents

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